1: The place where heroes are all good and villains are all bad; where super-villains exist and will do anything, even start wars that kill thousands or millions of innocents, just to gain a few bucks they don't need (or some other useless end).
The place where everything that the good guys say and do is good and everything the bad guys say and do is bad; where what makes the the good guys good and the bad guys bad is just that they *are* the good guys or the bad guys; and questions about what makes them so are never asked.
2: A vastly simplified and/or idealized model of reality.
3: The universe that radical left-wingers lives in.
Bill: "So Joe, are you going to vote for McCain or Obama?"
Joe: "Huh? McCain is a Republican. All Republicans are evil, stupid, and in the pocket of big business."
Bill: "Well, both McCain and Obama have very similar policies. I don't see much of a difference."
Joe: "McCain is a Republican."
Bill: "Ahh... right. Well, ok, Joe, I've got to ahhh....ummmm....wash my hair. So you go back home to the Cartoon Universe and have a really smiley-face day? OK? buh-bye."